As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPLICATION OF TAKEOFF POWER, AURAL WARNING HORN SOUNDED. ABORTED TAKEOFF AND RETURNED TO GATE. MAINTENANCE FOUND UPPER STABILIZER SWITCH S532 DEFECTIVE. REPLACED SWITCH AND PERFORMED TAKEOFF WARNING TEST PROCEDURE, NO DISCREPANCIES NOTED.